Steam-boiler



E. KmwELL.

STEAM BOILER. APPLICATION FILED MAR; 4, I9I9. l,348, 179. Patented Aug. 3, 1920.

2 SHEETS-SHEET 1. fbf '5 E. KIDWELL.'

- .STEAM BOILER. 1,348,179.

APPLICAT-ION FILEDVMAR. ,4, 1919.

Patented ug. 3, 1920 i .having reference, moreparticularly,

'type of boilers Wnerein transverse receps narrar OFFICE.

' nneen irrnwnnn, or Pernannrrnrn, rennsrnvnme.

STEAltI-BILER.

l Landini) Steamloilers, of 'which the ollowing is a,` specifica-tion.

This invention relates to steaml boilers; to that taeies and assciated banlzs oi water-tubes, rtogether with suitable battling, are Aeniployed, and wherein at least two o seid re ee ,teclee are arrangedv partly above and' partly below the normal level of the boiler water in order to consitute steani-and-water receptacles, whereof: the respective steamspaces are 'connected directly or indirectly by suitablydisposed drying or superheeting tubes adapted to conduct the steam, which Ais liberated from the water in one receptacle, to the steam-space ofi the other receptacle preparatory to the discharge or the steam for service.

The object of my invention is to provide a simple and eliicient construction whereby the triie level of the boiler water within the steam discharge receptacle is correctly indicated, irrespective of the fluctuations of the water-level in the steam. disengaging receptacle or other remote portion of the boiler, or the rate at which the boiler is being operated; thus etfectually obviating 'the otherwise liability orn the rising and mixing of the water with the steam, is the latter rushes into and is withdrawn from the discharge receptacle; and also enabling the proper and normal hivei` of the boilerl water to be easily maintained by the operator.

According to my invention l provide, Ain' addition to the main water circulating path, of 'the boiler in which the steam-disengaging receptacle is included, a suppleiuental vvvatei* circulating path in which the said receptacle and the steam discharge receptacle are included, said supplemental path being so disposed and proportioned in relation to the main path that the normal Water-level within the discharge receptacle is maintained. connect the Watengage glass directly to the water-space ol thesaid discharge receptacle, and thereby Secure an ac curate indication ot the normallevel vot' the water in the boiler at all times,

Specicaton of Letters P atent.

Patent-ee nog. 3, 192e.

/lpplietion filed March 4, ML Serial No. 286,581.

The, preferredconstruction herein illustrated embodying the principle of my invention will be hereniatterl described and the scope oi: the invention then be defined 1n .toe appended claims.

in the drawings Figure 1 is a partial longitudinal vertical section of a boiler ot the transverse drum type embodying my invention.

Fig. 2 is a vertical. section oi" the appa-V ratus as on the line Qf-2 ot Fig. 1.

Fig. is a similar section` as on the line iof Fig. 1.

1lis a section similar to Fig. 1, showing the boiler equipped with an additional steam-and-water drum and connections therefor.

Referring to the drawings, 1() designates the boiler setting; 11 the furnace therein, and l2 the outlet or breeching to the smokestacli at the rear of the setting.

13 dcsignates'a mud drum at the rear of the bridge Wall of the furnace: 14 a water drum located above the forward portion of the furnace and below the normal waterlevel. and 15. 1G two steam-and-uaterdrums arranged above the drums 13, il respectively.

The drums l5, 16 are located partly aboye and partly below the normal ivater-level, `thus providing in each a lower Water-space 1T and an upper steam-space 18. The feed- Water pipe 19 leads into the reardrum 15. The drums 13, 1st and 15 are connected in succeeding order by banks of tubes Q0, 21. 22 respectively, thus providing a continuous circulation path for. the Witter; and baffles 23 are suitably-disposed in relation to such 'banks in order to direct the hot gases and other products of combustion through appropriate passes from the front to the rear or the ai'iparatus. whereby a continuous cu- 'lculation of the water through the drums and tubes is? effected. v

The steam-space of the rear upper drum 15 is connected with the similar space ot the Jforward upper drum 16 by means of a series or" tubes 2l ivhichare preferably ar-A ranged within the path of the hot gases from the furnace, whereby the steam as rapidly as it is liberated 'from the water in the drum 15 flows into the steam-space of the forward upper drum 16,' such steam, during' its passage through the tubes, being eli'ectually dried or superheated. The drum 15 is provided with @discharge portion 25 'through which the-dry or superheatecl steam` as rapidly as it is produced is taken oil for service.

The steam as it fis' disengaged from the water in the drum l'causes a constant'and substantial fluctuation of the normal Water-I level within. said drum, thus rendring it diilcult by the usual 'water-gage eomiction to determine with an'y degree of( accuracy the level of the boiler water." Moreoven in some cases entrained waterin the steam'is' liable to pass over, to the forward drum through the tubes 24C, and unless such Water be withdrawn it floods the drum 16, and erforce, commingles with and is carried oftz fliythe steam; thus negativing the function of the drying or superheating tubes.

In order to maintain a water-level within v'the' drum '16 corresponding to thevnormal water-level within the steanpdisengaging drum 15,'i1irespective Aof the disturbance of the water within ythe-latter and of the de livery tothe-drum 16 of water carried over bythe steam, I reduce the capacity of the' tube bank 21 connectin the` Waterdrum with the -steam-disengagmg dwing-and divert the proportion 'of water which other".

wise would pass ,through saidtubes, into a secondary path fcirculation inwhich thc'l drums 15, 16 are included; that is to say/,"1

connect the driimsjll and 16 by means of tubes 26, andthe drums 16 and l'by means l of la corres onding number .of tubes 27 the capacity o 'which tubes 26, 27 i is approximately equal to that of the tubes omitted from the bank 21.' Thus a relatively small percentage of theV water is diverted from the main circulationdnto the drum 16, and.

thence circulated to the drum; 15 and back again to the main circulation, that is to say," the kinetic energy of the rising Water in the drum 14 compels a flow through the tube connection 26 up to the forward steam-- and-water drunn. andthe .Watertube con'- nection 2T enables the water to tlow backward from the1 latter drum and .thus cuornu plete the circulation. The tubes 27 are arranged within thepath of thehot gases.

flowing from the furnace, and are upwardly inclined as shown `from the front tol the rear of the apparatus, in order to .insure the circulation of the Water from the Wa-v -Lsaaiva throughthe tubes 20, and the supplementary passage, as through the .tubes fl26, in

the 'ratio olf-'about 250 to 1, or' 5 per cent. excellent results are attained course', I .do not limit niyselii ticular ratio 'or percentage. I attach the pipe connections 28 of the Water-gage glass '29 directly to the drum I6, and' hence thealthougm'f. i 'to that par-1` true 'level of the Water Within the boiler is accurately indicated tation of the Water ing 'drum or other boiler.

irrespectivel of the agiin the steam-disengagremote portion of the In a boiler of lnarrow width I piuaferablyvl arrange the auxiliary circulation tubes 26, 2i adjacent each sideof the. wall of the set ting, as seen in Figs. Qand, but in a Wide.'

boilerlemployinfg a larger number of main circulationwater tubes, and therefor-eau meV creased number of auxiliary circulation ltubes, I 'prefer to arrange the sets of aux' 4i ary tubes at suitable, intervals lapart t roughoutthe Width of the boiler.

In order to preventA the steam from iin pingingfagainst and disturbing the surfacev of. the water contained Within the drum. 16,

f asthe steam rushes into the latter from the. drying or superheating tubes, I provide said duim with: a horizontal deflectmg plate 30( directly below the exit ends of suoli tubes and above the waterdevel, which plate di'- verts the steamfrom its downward path preparatory to escaping through the 'dis charge portion 25. his plate 1s hinged to the inner side ofthedrum 16, as at 31', andy is supported in horizontal-,position b hooks 32 which are positioned within the t rum to engage eyes 3 3 on the plate.l The plate is hinged and temporarily 'supported asvijustdescribed inorder that it can be 'readily urihooked and swung downward to facilitate `access to the ends of the tubes,.2l, 22 when it is necessary to expand them into the tube holes in the wall of the discharge drum.

In case the feed-Water supplied by the pipe 19 contains a large saline content, violent land constant foaming of the water Within the drum 135 will `occur and large bubbles be thrown oil from the disengaging surfaceand carried over with thesteam, thereby reducing the practical efficiency of theboiler. To overcome this objectionv in a boiler embodying the principle of m in' vent1on, I provide the .construction illus-v trated in Fig,l l of the drawings; that isto say, I equip the boiler with an additionaly steam-and-water drum 34 which is posi- "foned at they rear of. the apparatus and aboveand below the 4vierter-level; the steamand-waterfspac'es ofsuch ydrum being con- 35, 36 respectively-g the water-space of'said drum 34 being connected with the mud drumv iii' l nected with the correspondingspaces of the drum 15l by means of steam and water tubes 1a bye tank of tuba amenable Maingate,

BSlbeing arranged between such bank and the. adjacent bank 22; and the feed-Water supply pipe 19 leading'into the additional drum instead of intr-J the drum i5. The drying or superheating tubes 2li leid from the steam-space of the drnro 3e to the steamspace ofthe' discharve drum.

1n a boiler embo ing the construction just .described the iced-Water Peuters the drzii 34; then slowly passes through and is preheated in the tube bank 37, thus precipitating-many of the impurities contained in the water; then entersthe mud drum i3 and passes into the main circulation. ri`he connection 36 tends to maintain a parity of Water-levels in the drums 34 and 15, and therefore such connection is preferably used; but if desired it may be omitted. The Wet steam from the drum l5 'passes through tubes 3b and enters the drum Se at an angle to the axis of the latter, the entrained water, by reason of its-momentum, being projected down upon and commingling .ritii the reli effected, and means for conducting the steamatively quiescent water in said drum Such steam then 'passes into and through the tubes 24: wherein it is dried and superheated before entering and flowing from the discharge drum 16.

it is to be uuderstoodthat the particular design of lthe boiler below the water-level does not adectc the priciple of my invention as applied thereto; and therefore l do not limit myself to the speciic type or design of boiler herein selected to exemplify my 'invention. It is also to be understood that l do not restrict myself to the details ot' construction herein disclosed, such, forlerample, as the number' and form oi the tubes in. the main and supplemental paths oi circulation, as such features may be TJaried in many respects within the spirit of the invention andv the scope of the appended claims.

'l' claim- 1 1. A. steam-boiier having a continuous main water circulation path and a supple.

mental Water circulation path, said main path including a steem-and-Water receptacle wherein the steam is disengaged from the Wat-er, and said supplemental path corruptieing a steam-and-water receptacle from which the steam is discharged 'from the boiler, said latter receptacle being outside the main path of circulation, means whereby a relatively small portion et Water is diverted from the main path of circulation and caused to 2[aow Ainto the discharge receptacle, and me ns located Within the heating zone oi' the furnace whereby a corresponding flow ot' Water from the discharge receptacle back to the main path of circulation is from the steam disengaging receptacle to the steam discharge receptacle.

2. A steam boiler having a continuous main Water circulation oath and a supplemental 'atei' circulation path communicating with the 'front and rear portions respectively of the main path, said .main path including at its rearward portion a steam-- andovater receptacle wherein the steam is disengaged from the water, and said supplemental path comprising` at its forward portion ar steam-and-water rcceilitacle from which the steam is discharged from the boiler, said latterreceptacle being outside the main path of circulation, means whereby arelatively sniall portion of the main body oi circulating Water is diverted into the dis charge' receptacle, and means located Within the heating zone oi' the furnace whereby a flow of Water from the ro'iit to the rear steam-andwater receptacle is eliected, and means jfor conducting the steam from 'the rear to the forward receptacle.

A; steam boiler having a continuous :nain Water circulation path and a supglemental Water circulation path coiuinunicat ing with the trout and rear portions ressgeo tively of the main path, sai'l main path including at its rearward portion steam-and- Water receptacle wherein the steam disengaged from the water, and said supple mental path comprisingy at its forward portion a steam-and-water receptacle from which the steam is discharged from the boiler, said latter receptacle being outside the main, path of circulation, rneans' whereby a relatively small portion of the main body of circulating water diverted .into the discharge receptacle, and means located Within the heating Zone of the fiorisce wherebya iow oi water from the Tfront to the rear steam-andorater receptacle is eifi'ccted, and means for conducting the steam from the rear to the forward receptacle, and a vater-gage directly connected to the trout receptacle. r

1i, A, water-tube boiler haring iront and rear transverse steam-and-Water drums, a "forward water drum, a rearward ruud drinn, a banky of tubes connecting said mud drum 'to the Waterv drum, a second bank of tubes connecting saidI water drum to the rear steam-and-Water drum, a third barili' of tubes connectingf said rear drum to the mud drum, relatively small Water, tube coiinecam tion between the Water drum and the water space of thcfront stcam-and-Water drum, a

relatively small` tube connection between said Water-space and the unter-space of the rear steam-and-water drum. said latter tube connection vbeing located within the heating;`

Mii

connecting said Water drum tol the rear zone 'oft-he fummo, and man iforfmnducfa steam-and-'Water drum, athird bunk of tubes ing the steam from the rem? w the rrm connecting said rear drum to the mud drum, Steam-and-Water drum, 61);,geth4ar wmh. a 1 a relatively small Water tube connection bewater-gage directly connected 1go the :from

5l tWeen'the-Waterjdrum and the water-space Steam-andwater drum.. 15"

of the front steamand-water drum, a reL Slgned at New Yofk 1n he cowuy o sm' atvely small -tube connection between said State of New Yok hs shd day of March Water-space and the Water-space of the fem? A. I). 1919. steam-and-Water drum, said latter tube colf y 10 nectio'n being located Within the heating EDGAR KIDWELL; -v 

